Vent box hinge - 1966 Plymouth Valiant

I do have an extra vent box. I will check the hinges on it. I think it would be easier to replace the whole box. Might have to take the box out just to replace the hinge anyway. If i remember correctly they are held in by 2 or 3 J hooks with 3/8" nuts inside the box. They are kinda just hanging there...lol